| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F | |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Nov. 11 - Nov. 20 | |
| Average Last Frost Date: | Apr. 1 - Apr. 10 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 45a - Southern Inner Piedmont | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 30066 - Marietta, GA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 29 | 31 | 38 | 45 | 54 | 62 | 67 | 66 | 60 | 47 | 39 | 32 | 48 |
| Avg Max Temp (°F) | 50 | 55 | 63 | 71 | 78 | 85 | 88 | 87 | 81 | 72 | 62 | 53 | 70 |
| Avg Precip (In.) | 5.62 | 4.9 | 5.82 | 4.3 | 4.35 | 3.83 | 4.5 | 4.15 | 3.78 | 3.46 | 4.13 | 4.3 | 53.12 |